I picked this up about 3 years ago for about $240. Now a discontinued model.
It was great for driving my Sennheiser HD-580s from my laptop using the USB-DAC; much less noise and way better sound / bass response than going straight from the cheapo headphone out of my old Toshiba laptop. Helped me drown out the background noise in cubicle land.
Also works great as a portable headphone amp using my iphone as a source.
Can be powered by 9 volt battery or USB cable.
My latest gig as stay at home dad doesn't allow for much headphone listening time. I'd like to pass this onto someone that will enjoy it.
No pics handy, but can provide them. It's near mint as I've always kept it in an old hard sunglass case.
How about $140 shipped?
PM if interested or if you have questions.
Thanks for looking!